cost,s

[kal]

ref electrical appliances ,, if tarift  times KW rateing=rrunning cost per  hour,,how do you  work out running cost if figures given ei wet vac cleaner are gived as 230/40V  ,,50hz ,, 110 watts

     any know the equasion????

                cheers

                           Kal      

[kempie]

110 watts = 0.11 kW

Here's a calculator... http://www.ukpower.co.uk/running-costs-elec.asp

[ted crilly]

A unit of electricity is a killowatt/hour. So if you use 1 kw (or 1000) watts for 1 hour you will be billed  for 1 unit. Example a 1 kw heater left on for 1 hour uses 1 unit. Or a 100 watt lightbulb left on for 10 hours uses 1 unit. I have a tumble dryer rated at 3.2 kw, for every hour its on it costs me the equivalent of 3.2 units. Basicaly the higher the power rating the more it costs to run.  

[Flurfl]

that number is usually the maximum number of Watts that it will draw. The appliance may use less than that on different settings or in a "Standby"mode, such as microwaves and videos.

[ted crilly]

You would have to run your 110 watt wetvac for 10 hours to be billed for 1.1 units assuming it runs at full load current (max load). You need to check your electricity bill and check the cost per unit then add one tenth to it to give you the exact cost. Resistive loads such as builbs and heaters (cookers and kettels included) tend to have a constant power draw, where as inductive loads, items driven by motors such as vacuum cleaners, power tools washing machines etc draw more current, use more power and cost more to run when under load. Assuming  a domestic customer is charged about 10p a unit, your wetvac is costing about 1.1p a hour to run